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Derivative Financial Instruments (Details) - USD ($)
3 Months Ended 6 Months Ended
Jan. 04, 2016
Jan. 23, 2014
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Derivatives, Fair Value [Line Items]              
Hedge ineffectiveness gain (loss)         $ 0 $ 0  
Fair value of derivative instrument [Abstract]              
Fair value of interest rate swaps     $ (1,011,000)   (1,011,000)   $ (569,000)
Interest Rate Swap Contracts              
Derivatives, Fair Value [Line Items]              
Percentage of Term Loan balance covered under interest rate swap contract   75.00%          
Termination of contract date Jan. 01, 2019 Sep. 29, 2023          
Unrealized net losses recorded in Accumulated other comprehensive loss         $ 1,000,000    
Interest Rate Swap Contracts | One Month LIBOR              
Derivatives, Fair Value [Line Items]              
One month variable interest rate (in hundredths)     0.45%   0.45%    
Interest Rate Swap Contracts | Derivatives in Cash Flow Hedging Relationships | Interest Expense              
Effect of interest rate swap contract accounted for derivative instrument on Consolidated Statements of Income [Abstract]              
Amount of Gain (Loss) Recognized in Accumulated OCI (Effective Portion)     $ (109,000) $ 179,000 $ (442,000) 51,000  
Amount of Loss Reclassified from Accumulated OCI into Income (Effective Portion)     71,000 $ 52,000 134,000 $ 104,000  
Interest Rate Swap, Effective January 23, 2014              
Derivatives, Fair Value [Line Items]              
Notional amount     $ 7,400,000   $ 7,400,000    
Fixed interest rate (in hundredths)     2.86%   2.86%    
Interest Rate Swap Effective January 4, 2016              
Derivatives, Fair Value [Line Items]              
Notional amount     $ 11,700,000   $ 11,700,000    
Fixed interest rate (in hundredths)     1.28%   1.28%